Cloudera 5.10.0 安装Sqoop2时问题与解决方案

[mw_shl_code=shell,true]Thu Apr 20 10:29:05 CST 2017
JAVA_HOME=/usr/java/jdk1.7.0_67-cloudera
using 5 as CDH_VERSION
CONF_DIR=/run/cloudera-scm-agent/process/238-sqoop-SQOOP_SERVER
CMF_CONF_DIR=/etc/cloudera-scm-agent
log4j:ERROR A "org.apache.log4j.RollingFileAppender" object is not assignable to a "org.apache.log4j.Appender" variable.
log4j:ERROR The class "org.apache.log4j.Appender" was loaded by
log4j:ERROR [org.apache.catalina.loader.StandardClassLoader@52437b9a] whereas object of type
log4j:ERROR "org.apache.log4j.RollingFileAppender" was loaded by [WebappClassLoader
  context: /sqoop
  delegate: false
  repositories:
    /WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@52437b9a
].
log4j:ERROR Could not instantiate appender named "RFA".
log4j:WARN No appenders could be found for logger (org.apache.hadoop.util.NativeCodeLoader).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.[/mw_shl_code]

这个问题，是由于log的jar包冲突导致。可以直接删除log的jar包。
cd /opt/cloudera/parcels/CDH-5.10.0-1.cdh5.10.0.p0.41/lib/sqoop2/webapps/sqoop/WEB-INF/lib
mv log4j-1.2.16.jar log4j-1.2.16.jar.bak


刚开始我修改的/var/lib/sqoop2/tomcat-deployment/webapps/sqoop 目录下的pom文件和jar包，发现每次重启sqoop2，这个目录下的文件都会被覆盖，后来，通过 find / -name sqoop.war命令查找到/opt/cloudera/parcels/CDH-5.10.0-1.cdh5.10.0.p0.41/lib/sqoop2/ 这个目录下也存在，测试修改了下这个目录下的文件，生效了。OK，搞定。